Depends on your volume.
In my company, we run 4 lasers, 3 color, 1 b&w. Two monster Epson 4880 color ink jets.
We had an all in one when company first got started. we went thru ink way too fast. My buddies with not much volume have their ink dry out. I prefer laser when possible. Much more cost savings. A cheap b&w can be had for less than two bills.